Figure 1.3.2.2

Koch, E.

doi:10.1107/97809553602060000574

International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

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International Tables for Crystallography (2006). Vol. C. ch. 1.3, p. 12

Figure 1.3.2.2

E. Koch^a

^a Institut für Mineralogie, Petrologie und Kristallographie, Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany

Figure 1.3.2.2

Projection of the lattices of the twin components of an orthorhombic twinned crystal (oP, b = $[\sqrt3]$ a) with twin index 2. The twin may be interpreted either as a rotation twin with twin axis [310] or as a reflection twin with twin plane (110). The figure shows, in addition, that twin index 1 results if the oP lattice is replaced by an oC lattice in this example (twinning by pseudomerohedry ).